I’d say the single most annoying part of my mobile experience is when I accidentally click on a strategically placed ad. Most of the time, ads are placed in close proximity to where a user needs to touch in order to scroll or advance — not to mention there’s little screen real estate to begin with. Thankfully, and surprisingly, Google has been working on making accidental clicks a thing of the past.

Apple is one of the best-known brands, so no wonder it paid Google just $18 million in 2011 for search traffic. By comparison, HP and Dell, which are breathing heavy to keep ahead of the Cupertino, Calif. tech giant ranked No. 1 and No. 2 for spending big bucks flogging their products online.

Google’s none too happy about the breach, saying: “We’re now looking into the possibility that someone improperly disclosed confidential information about our clients, and [we] will take all appropriate action.”

But Apple can’t be happy about the leak either, particularly since it highlighted the fact that Apple spends a million dollars a month on Google Adwords adverising… despite the fact that they have a competing network called iAds.

Of course, a million bucks a month is just a drop in Apple’s coffers, and Apple can’t trust iAds alone to promote their own products successfully yet, given its limited rollout to iOS devices. Still, Apple ultimately intends to go head-to-head with Google Adwords for the mobile space… a blip in the headlines saying they are giving money to their rival has to be annoying, no matter how inconsequential the amount.